William Blair Investment Management, LLC

Investment Portfolio & 13F Holdings Analysis

About

WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC is an institutional investment manager that filed its latest Form 13F for 2025Q1, reporting 423 holdings worth $35.6 billion. Form 13F filings provide transparency into the equity holdings of institutional investment managers with over $100 million in assets under management. This page displays the most recent portfolio holdings, allowing investors to track position changes, new investments, and portfolio composition.

Filing Details

13F-HR • 2025-03-31

SEC FilingSEC DataHachi Filing

Report Date: 2025-03-31
Filing Date: 2025-05-09
Total Holdings: 423
Total Value: 35621637487
Accession Number: 0001644956-25-000018
Form Type: 13F-HR
CIK: 0001644956
Manager Name: William Blair Investment Management, LLC

Data Enrichment

97% identified

410 identified13 unidentified

Holdings

SEC FilingSEC DataHachi Filing

Manager:

423 positions • $35,621,637.487K total value

423 positions

Manager:

SEC FilingSEC DataHachi Filing

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MICROSOFT CORP

MSFT|594918104

4127203(-6.8%)

Value:

$1.5T(-17.0%)

NVIDIA CORP

NVDA|67066G104

12197638(-8.1%)

Value:

$1.3T(-25.9%)

TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD

TSM|874039100

7361683(-4.7%)

Value:

$1.2T(-19.9%)

AMAZON COM INC

AMZN|023135106

6118131(-10.5%)

Value:

$1.2T(-22.4%)

Apple Inc.

AAPL|037833100

5239398(+2.6%)

Value:

$1.2T(-8.9%)

Meta Platforms, Inc.

META|30303M102

1572230(-5.5%)

Value:

$906.2B(-7.0%)

Mastercard Inc

MA|57636Q104

1215314(-15.4%)

Value:

$666.1B(-11.9%)

Carlyle Group Inc.

CG|14316J108

12171478(-8.1%)

Value:

$530.6B(-20.7%)

Broadcom Inc.

AVGO|11135F101

3078817(+375.4%)

Value:

$515.5B(+243.3%)

MERCADOLIBRE INC

MELI|58733R102

255567(-1.1%)

Value:

$498.6B(+13.4%)

Sea Ltd

SE|81141R100

3678011(+64.7%)

Value:

$479.9B(+102.6%)

Primo Brands Corp

PRMB|741623102

11402012(+2.1%)

Value:

$404.7B(+17.8%)

COPART INC

CPRT|217204106

6803733(+2.0%)

Value:

$385.0B(+0.6%)

O REILLY AUTOMOTIVE INC

ORLY|67103H107

258834(+10.0%)

Value:

$370.8B(+32.9%)

INTUIT INC.

INTU|461202103

575615(-1.4%)

Value:

$353.4B(-3.6%)

CHIPOTLE MEXICAN GRILL INC

CMG|169656105

6802345(+9.3%)

Value:

$341.5B(-9.0%)

COSTCO WHOLESALE CORP /NEW

COST|22160K105

353579(+4.9%)

Value:

$334.4B(+8.2%)

UNITEDHEALTH GROUP INC

UNH|91324P102

625021(-5.7%)

Value:

$327.4B(-2.4%)

LINDE PLC

LIN|G54950103

690814(-29.9%)

Value:

$321.7B(-22.0%)

Stride, Inc.

LRN|86333M108

2319593(-6.0%)

Value:

$293.4B(+14.4%)

Instrument	Shares		Other Manager	Value
Microsoft Corp(MSFTcusip594918104)	4.1M	QoQ -6.85% (-304.0K) YoY -4.63% (-200.5K)	All Managers (Combined)	$1.5B	QoQ -17.04% (-$318.4M) YoY -14.90% (-$271.5M)
Nvidia Corp(NVDAcusip67066G104)	12.2M	QoQ -8.14% (-1.1M) YoY +895.04% (+11.0M)	All Managers (Combined)	$1.3B	QoQ -25.86% (-$461.3M) YoY +19.35% (+$214.4M)
Taiwan Semiconductor Manufacturing Co Ltd(TSMcusip874039100)	7.4M	QoQ -4.66% (-360.4K) YoY -22.55% (-2.1M)	All Managers (Combined)	$1.2B	QoQ -19.86% (-$302.9M) YoY -5.50% (-$71.2M)
Amazon Com Inc(AMZNcusip023135106)	6.1M	QoQ -10.48% (-716.4K) YoY -3.68% (-234.0K)	All Managers (Combined)	$1.2B	QoQ -22.36% (-$335.4M) YoY +1.59% (-$18.2M)
Apple Inc.(AAPLcusip037833100)	5.2M	QoQ +2.64% (-134.9K) YoY NEW(+5.2M)	All Managers (Combined)	$1.2B	QoQ -8.95% (-$114.4M) YoY NEW(+$1163.8M)
Meta Platforms, Inc.(METAcusip30303M102)	1.6M	QoQ -5.50% (-91.6K) YoY +670.96% (+1.4M)	All Managers (Combined)	$906.2M	QoQ -6.98% (-$68.0M) YoY +815.09% (+$807.1M)
Mastercard Inc(MAcusip57636Q104)	1.2M	QoQ -15.39% (-221.1K) YoY -17.15% (-251.7K)	All Managers (Combined)	$666.1M	QoQ -11.92% (-$90.2M) YoY -5.71% (-$40.4M)
Carlyle Group Inc.(CGcusip14316J108)	12.2M	QoQ -8.13% (-1.1M) YoY +2.97% (-352.1K)	All Managers (Combined)	$530.6M	QoQ -20.69% (-$138.4M) YoY -4.30% (-$23.9M)
Broadcom Inc.(AVGOcusip11135F101)	3.1M	QoQ +375.40% (+2.4M) YoY NEW(+3.1M)	All Managers (Combined)	$515.5M	QoQ +243.33% (+$365.3M) YoY NEW(+$515.5M)
Mercadolibre Inc(MELIcusip58733R102)	255.6K	QoQ -1.12% (-2.9K) YoY -29.59% (-107.4K)	All Managers (Combined)	$498.6M	QoQ +13.43% (-$59.1M) YoY -9.15% (-$50.2M)
Sea Ltd(SEcusip81141R100)	3.7M	QoQ +64.69% (+1.4M) YoY NEW(+3.7M)	All Managers (Combined)	$479.9M	QoQ +102.56% (+$243.0M) YoY NEW(+$479.9M)
Primo Brands Corp(PRMBcusip741623102)	11.4M	QoQ +2.15% (+240.1K) YoY NEW(+11.4M)	All Managers (Combined)	$404.7M	QoQ +17.82% (+$61.2M) YoY NEW(+$404.7M)
Copart Inc(CPRTcusip217204106)	6.8M	QoQ +1.98% (+132.3K) YoY +23.74% (+1.3M)	All Managers (Combined)	$385.0M	QoQ +0.56% (+$2.2M) YoY +20.90% (+$66.6M)
O Reilly Automotive Inc(ORLYcusip67103H107)	258.8K	QoQ +10.02% (+23.6K) YoY +15.26% (+34.3K)	All Managers (Combined)	$370.8M	QoQ +32.91% (+$91.8M) YoY +46.26% (+$117.3M)
Intuit Inc.(INTUcusip461202103)	575.6K	QoQ -1.36% (-8.0K) YoY +13.12% (+66.8K)	All Managers (Combined)	$353.4M	QoQ -3.64% (-$13.4M) YoY +6.86% (+$22.7M)
Chipotle Mexican Grill Inc(CMGcusip169656105)	6.8M	QoQ +9.26% (-576.6K) YoY +6149.22% (+6.7M)	All Managers (Combined)	$341.5M	QoQ -9.02% (-$33.9M) YoY +7.94% (+$25.1M)
Costco Wholesale Corp /New(COSTcusip22160K105)	353.6K	QoQ +4.86% (+16.4K) YoY -0.79% (-2.8K)	All Managers (Combined)	$334.4M	QoQ +8.23% (+$25.5M) YoY +28.07% (-$73.3M)
Unitedhealth Group Inc(UNHcusip91324P102)	625.0K	QoQ -5.69% (-37.8K) YoY -36.04% (-352.3K)	All Managers (Combined)	$327.4M	QoQ -2.36% (-$7.9M) YoY -32.29% (-$156.1M)
Linde Plc(LINcusipG54950103)	690.8K	QoQ -29.89% (-294.6K) YoY -46.08% (-590.4K)	All Managers (Combined)	$321.7M	QoQ -22.03% (-$90.9M) YoY -45.92% (-$273.2M)
Stride, Inc.(LRNcusip86333M108)	2.3M	QoQ -5.97% (-147.4K) YoY +31.31% (+553.1K)	All Managers (Combined)	$293.4M	QoQ +14.44% (-$37.0M) YoY +163.45% (+$182.1M)